I rent the downstairs apt of what used to be a garage. There is one other unit located on the second floor. My smoke alarm was going off frequently without my knowing why. Landlord finally told me this last (9th) time, that the upstairs and downstairs smoke alarms are hard wired together so I know if my neighbor has set their place on fire, and vice versa. Needed to be that way to be up to code.
Is this a normal occurrence? Thanks.